Vibrating screen



May 31, 1938. w E 2,119,273

VIBRATING SCREEN Filed May 24, 1937 2 Sheefs-Sheet 1 May 31, 1938. FYE 2,119,273

VIBRATING S GREEN Filed May 24, 1937 2 Sheets-Shet 2 Inventor Q K3,? 9- B w M W m Attorneys Patented May 31 1938 UNITED STATES PATENT OFFICE 2,119,273 VIBRATING soREEN William A. Fye, Hollidaysburg, Pa., assignor to McLanahan & Stone Corporation, Hollidaysburg, Pa,, a corporation of Pennsylvania Application May 24, 1937, Serial No. 144,496

2 Claims.

This invention relates in general to screens of the vibratory type, and more particularly improved means for mounting or fastening t screen box to its stationary frame.

The invention consists in the provision of improved spring means for fastening or supporting the screen box on its supporting frame so that the screen box is not carried by compression, is now the case when using resilient means su as ch as springs for this purpose, but rather, so that the screen box is carried by tortion on the spring. A further object of the invention is'to provide improved means for adjusting the tortion on t springs supporting or fastening the screen box to its supporting frame.

The invention, together with its objects and advantages will be best understood from t following description taken in connection with the accompanying drawings, wherein:

Figure 1 is a top plan View of a vibratory sore having my invention applied thereto.

Figure 2 through the screen.

is a longitudinal sectional View Figure 3 is a fragmentary detail sectional view showing the improved spring support or faste ing means for the screen box.

Figure 4 is a detail elevational View showing one of my improved spring supports for t screen box.

Figure 5 is a fragmentary detail sectional view showing the manner of securing the upper and and supporting frame or beams 66. The upper and lower screen cloths are indicated by the reference numerals l and 8 respectively, and

shown in Figure 5 at the longitudinal edges thereof the screen cloths are provided with angle iron frame members 5 which rest on angle ir ledges Ill provided on the sides of the screen b Q11 OX and coo-perable with channel bars H for securing the screens in place, channel bars it being se cured to the sides of the box 5 through the medium of bolts l2 as shown.

In accordance with the present invention there are provided four spring assemblies [3 for supporting the screen box 5 from the stationary beams 6 and these spring assemblies [3 are arranged as shown in Figure 1, wherein it will seen that the spring assemblies l3 are arranged at opposite sides of the box 5 and adjacent t respective opposite ends of the box.

As clearly shown in Figures 3 and 4, each spring assembly l3 includes a bearing member [4 .bolted or otherwise secured as at I5 to the supporting beam 6. A bolt It has a diametrically enlarged intermediate portion fitting Within the bearing It as shown in Figure 3 and a reduced longitudinally split end portion ll, together with a non-circular or hexagonal end I8.

A coil spring [9 has one end thereof disposed within the slot 20 provided in the bolt end I1, and said bolt end at its terminal is provided with threads to receive a nut 2| that serves to contract the end I! of the bolt to clamp the said end of the spring l9 securely within the slot 25 in said bolt end I'l.

At the free end thereof the spring [9 is provided with an eye 22 that is secured to a bolt 23 projecting from one side of the screen box 5 as will be clear from a study of Figures 1 and 4.

To secure the bolt l6 against turning movement within the bearing l4, and the spring l9 with its tension at the desired adjustment, there is sleeved onto the hexagonal end N3 of the bolt a ferrule 24 that has a conformable fit on the end [8 of the bolt l6 and is provided externally with an annular series of ribs or teeth 25 that engage complemental internal teeth 26 provided in the bearing [4 at one end of the. bore of said bearing as shown in Figure 3.

A cotter pin or the like 21 may be resorted to for securing the ferrule 24 against accidental sliding movement along the end 18 of bolt Hi.

It will thus be seen that I have provided a resilient or spring support for the screen box 5 whereby the latter is supported in a resilient manner from the stationary beam 6 of the screen assembly,

When it is desired to tighten a spring I 9 the ferrule 24 is slid outwardly to disengage the teeth 25 thereof from the teeth 26 and by applying a wrench or the like to the end is of the bolt the latter is given a sufficient number of turns so as to wind the spring thereon an amount suflicient to carry the weight of the screen box. When this has been completed, the ferrule 24 is slid into the position as shown in Figure 3 with the teeth 25 thereof meshing with the teeth 26 of the bearing M whereby the bolt I6 is held against rotative movement.

A spring supporting arrangement as comprehended by the present invention finds its merits in that the screen box is not carried by compression on the springs but rather by tortion, and the arrangement of bearing, ferrule, and bolt, provides for each of the springs a method of adjusting this tortion so that the screen box is carried in correct position at all times and under all circumstances.

It is thought that a clear understanding of the construction, utility and advantages of an invention of this character will be had without a more detailed description.

Having thus described the invention, what is claimed as new is:

1. Supporting means for resiliently supporting a vibratory screen box from a stationary supporting means, and including a bearing mounted on the supporting means, a bolt having an intermediate cylindrical portion journalled in said bearing, said bolt having a longitudinally split end and a hexagonal end respectively, said split end being provided with threads, a coil spring disposed substantially concentric to the split end of the bolt and having an end engaged in the slit of said bolt end, a nut threaded on the threaded end of the bolt for securing said end of the spring engaged with the bolt, means securing the free end of the screen to one side of the screen box, a ferrule sleeved on and conformably fitting the hexagonal end of said bolt and provided with an external circumferential series of teeth, and said bearing having a circular series of internal teeth complemental to the teeth on said ferrule for securing the bolt against rotative movement.

2. In a vibratory screen structure, a screen box, supporting means for the screen box, a bearing mounted on said supporting means, a bolt having a portion thereof journalled in said bearing, a

coil spring disposed about one end of the bolt laterally of said bearing and having an end secured to the bolt, said coil spring also having a second end secured to the screen box at one side of the latter, and said bolt being rotatable in the bearing for adjusting the tension of said spring, a ferrule on the bolt to rotate therewith, and inter-engaging means on said bearing and said ferrule for securing the bolt at the desired position of rotative adjustment.

WILLIAM A. FYE. 

